Help with Extensions Please

Firstly, I'd like to say that this is a fabulous forum. I've learned a ton already (especially from Kristin! Thanks!). I may ramble a bit, so I appologise, but I'm hoping some of you wonderful ladies out there can offer some advice and illumination on my dilemma!

My question is regarding human hair vs. synthetic. I have had extensions (woven in, not hairlocks) for about six months now and after much searching (and much money spent on crappy quality hair) I have found hollywood (by royal imex) hand tied hair. At least, I've been told it's hand tied by the retailer I go to, but the track seems too thick to be hand tied. I found yesterday, through surfing the web, that Bohyme is claiming to be the best hair out there and I have found it inexpensively at ebonyline.com, who order it in large quantities and offer discounts to their clients. Anyway, my question is:
Is it really the best and has anyone used it and just loved it?

I'm getting married in may and want to have the most beautiful hair possible for the wedding (obviously!).

Also, how good is synthetic hair vs. human hair and what is a good synthetic brand? If I can find a good synthetic brand, I might start using that because human is very expensive (although it lasts for a while).
Thanks again to all you ladies out there!
the Cat Goddess